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<title>Memory Snapshot Comparison</title>
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<h1>Memory Snapshot Comparison</h1>
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<p>Use to display a comparison of two memory snapshots. 
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<p><b>Sampling Comparison</b></p>
<p>If the <b>Quick (Sampled)</b> option was selected for the profiling session, the comparison provides details on the difference between the number of live objects in the two snapshots.</p>

<table summary="Description of sampling comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0">
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<th align="left" valign="bottom" id="r1c1-t27">Element</th>
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<p>Class Name - Live Objects</p>
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<td align="left" headers="r2c1-t27 r1c2-t27">Displays the name of the class or live object.</td>
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<td align="left" id="r3c1-t27" headers="r1c1-t27">
<p>Live Bytes [%]</p>
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<td align="left" headers="r3c1-t27 r1c2-t27">Provides a graphic display of the relative amount of memory currently occupied by the live object.</td>
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<p>Live Bytes</p>
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<td align="left" headers="r4c1-t27 r1c2-t27">Displays the memory size in bytes that is currently occupied by the live object.</td>
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<p>Live Objects</p>
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<td align="left" headers="r5c1-t27 r1c2-t27">Displays the exact difference between the number of live objects in the two snapshots.</td>
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<p><b>Allocations Comparison</b></p>
<p>If <b>Record object creation</b> was selected for the profiling session, the comparison provides details on the total number of instances.</p>

<table summary="Description of allocations comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0">
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<p>Class Name - Allocated Objects</p>
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<td align="left" headers="r2c1-t28 r1c2-t28">Displays the name of the class or allocated object.</td>
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<p>Bytes Allocated [%]</p>
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<td align="left" headers="r3c1-t28 r1c2-t28">Provides a graphic display of the relative amount of memory occupied by instances of the class.</td>
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<p>Bytes Allocated</p>
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<td align="left" headers="r4c1-t28 r1c2-t28">Displays the memory size in bytes occupied by the instances of the class.</td>
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<p>Objects Allocated</p>
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<td align="left" headers="r5c1-t28 r1c2-t28">Displays the number of all instances of the class.</td>
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<p><b>Liveness Comparison</b></p>
<p>If <b>Record both object creation and garbage collection</b> was selected for the profiling session, the comparison provides more detailed data on live instances.</p>

<table summary="Description of liveness comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0">
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<th align="left" valign="bottom" id="r1c1-t29">Element</th>
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<td align="left" id="r2c1-t29" headers="r1c1-t29">
<p>Class Name - Allocated Objects</p>
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<td align="left" headers="r2c1-t29 r1c2-t29">Displays the name of the class or allocated object.</td>
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<td align="left" id="r3c1-t29" headers="r1c1-t29">
<p>Live Bytes [%]</p>
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<td align="left" headers="r3c1-t29 r1c2-t29">Provides a graphic display of the relative amount of memory occupied by live instances of the class.</td>
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<td align="left" id="r4c1-t29" headers="r1c1-t29">
<p>Live Bytes</p>
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<td align="left" headers="r4c1-t29 r1c2-t29">Displays the memory size in bytes that is currently occupied by the live instances of the class.</td>
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<p>Live Objects</p>
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<td align="left" headers="r5c1-t29 r1c2-t29">Displays the number of current live instances of the class.</td>
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<td align="left" id="r6c1-t29" headers="r1c1-t29">
<p>Allocated Objects</p>
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<td align="left" headers="r6c1-t29 r1c2-t29">Displays the number of all instances of the class created since the application was started or since the results were last reset.</td>
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<p>Average Age</p>
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<td align="left" headers="r7c1-t29 r1c2-t29">Displays the average age in generations of live instances of the class.</td>
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<p>Generations</p>
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<td align="left" headers="r8c1-t29 r1c2-t29">Displays the number of different generations (garbage collections survived) of live instances of the class.</td>
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<hr><p><b>Related Topics</b></p>
<p><i>Developing Applications with NetBeans IDE</i>, 
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<p><i>Developing Applications with NetBeans IDE</i>, 
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